1100 Keyboard bezel assembly

1110 Bluetooth daughter card (BDC-3.0)

1120 Backup battery

1130 Smart Card or Smart Card dummy spacer

1140 Speaker assembly

1150 Thermal module

1170 LCD unit

1180 Base cover assembly

Table 34. Removal steps of I/O sub card

1

2

1

 

Step

Screw (quantity)

Color

Torque

 

 

 

 

 

 

 

 

 

M2 × 7 mm, wafer-head, nylon-coated (2)

Silver

0.181 Nm

 

1

 

 

 

 

 

 

(1.85 kgfcm)

 

 

 

 

 

 

When installing: Make sure that the connector is attached firmly.

 

 

1200 System board assembly, magnesium structure frame, and modem daughter card (MDC)

Note: The system board does not contain the Ethernet port, the ac power connector, and the modem port. For the Ethernet port, see 1190 I/O sub card. The ac power connector is installed on the magnesium structure frame. If the computer is equipped with an MDC, the modem port is also installed on the magnesium structure frame.

For access, remove these FRUs in order:

1010 Battery pack

1020 Serial Ultrabay Enhanced device or travel bezel

1030 DIMM slot cover

1040 DIMM (bottom slot)

1050 Hard disk drive slot cover, hard disk drive (HDD) and HDD rubber rails or solid state drive (SSD) and storage converter

1060 Keyboard

1070 DIMM (upper slot)

1080 PCI Express Mini Card for wireless LAN

1090 PCI Express Mini Card for wireless WAN or mSATA solid state drive

Chapter 9. Removing and replacing a FRU 93

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IBM T520I, W520 manual Removal steps of I/O sub card